/*
 * Taps of Fire
 * Copyright (C) 2009 Dmitry Skiba
 * 
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation, either version 3 of 
 * the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.tf.midi;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;

public class MidiDataInputStream extends DataInputStream {

	public MidiDataInputStream(InputStream is) {
		super(is);
	}

	public int readVariableLengthInt() throws IOException {
		int result=readByte();
		if ((result & 0x80)==0) {
			return result;
		}
		result&=0x7F;
		while (true) {
			int b=readByte();
			result=(result<<7)+(b & 0x7F);
			if ((b & 0x80)==0) {
				break;
			}
		}
		return result;
	}
}
